Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quando Deng Xuan venceu pela primeira vez o individual feminino?
 ###Tabelas: CREATE TABLE previous_winners (previous_winners_id AUTO_INCREMENT PRIMARY KEY, Year INT, Men's singles VARCHAR, Women's singles VARCHAR, Men's doubles VARCHAR, Women's doubles VARCHAR, Mixed doubles VARCHAR) CREATE TABLE australasia_pool_a (australasia_pool_a_id AUTO_INCREMENT PRIMARY KEY, Club VARCHAR, Played INT, Lost INT, Drawn INT, Against INT, Diff. INT, Points INT) CREATE TABLE early_u.s._unmanned_lunar_missions_1958–1965 (early_u.s._unmanned_lunar_missions_1958–1965_id AUTO_INCREMENT PRIMARY KEY, U.S. mission VARCHAR, Mass (kg) INT, Launch vehicle VARCHAR, Launched VARCHAR, Mission goal VARCHAR, Mission result VARCHAR) CREATE TABLE mixed_doubles:_13_4_titles_9_runner-ups (mixed_doubles:_13_4_titles_9_runner-ups_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Year INT, Championship VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents in the final VARCHAR, Score in the final VARCHAR) CREATE TABLE 1961–1995 (1961–1995_id AUTO_INCREMENT PRIMARY KEY, Year INT, Artist VARCHAR, Song VARCHAR, UK Chart VARCHAR, At Eurovision VARCHAR)  
SELECT MIN Year FROM previous_winners WHERE Women's singles = deng xuan